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Prevalence of hemifacial spasm in Oslo, Norway

From the Department of Neurology, The National Hospital, University of Oslo, Norway.
B.N. and K-D.L. contributed equally to the study.

Address correspondence and reprint requests to Dr. Espen Dietrichs, Professor and Chairman, Department of Neurology, The National Hospital, University of Oslo, N-0027 Oslo, Norway; e-mail: espen.dietrichs{at}klinmed.uio.no

All patients seeking medical or surgical treatment for hemifacial spasm (HFS) in Oslo, Norway were identified in a service-based prevalence study. Only four hospital departments offered services for Oslo citizens with HFS. Fifty patients with HFS were treated. The total prevalence was 9.8 per 100,000. The prevalence increased with age to 39.7 among those older than 70 years. The use of antihypertensive drugs was significantly more common in HFS patients (36%) than in Oslo’s general population.

Received April 19, 2004. Accepted in final form June 17, 2004.

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